I have a simple python socket server and simple android [java] socket client. The client not successful to connect my server.
My server working good (I have tried with simple socket client in python).
Server (python):
import socket
def main():
listening_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_address = (' ', LISTEN_PORT)
listening_sock.bind(server_address)
listening_sock.listen(1)
client_soc, client_address = listening_sock.accept()
client_msg = client_soc.recv(1024)
client_msg = client_msg.decode()
print(client_msg)
answer = "hello " + client_msg
client_soc.sendall(answer.encode())
client_soc.close()
listening_sock.close()
#print(str(get_distance_by_four_points("31.766977", "34.622898", "31.769887", "34.625430", "31.772632", "34.628273", "31.779327", "34.632951") / 1000) + " km")
if __name__ == "__main__":
main()
Client (java):
package com.example.client;
import androidx.appcompat.app.AppCompatActivity;
import android.annotation.SuppressLint;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
public class MainActivity extends AppCompatActivity {
EditText etToServer;
TextView tvFromSer;
private static Socket sock;
private static ServerSocket serSock;
private static PrintWriter prWriter;
private static InputStreamReader in;
private static BufferedReader bf;
String message = "";
private static String LOCAL_IP = "127.0.0.1";
private static int PORT = 2002;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
etToServer = (EditText)findViewById(R.id.etxtUsername);
tvFromSer = (TextView)findViewById(R.id.tvFromServer);
}
public void sendMsg(View view) {
message = etToServer.getText().toString();
myTask myT = new myTask();
myT.execute();
}
class myTask extends AsyncTask<Void,Void, Void> {
@SuppressLint("WrongThread")
@Override
protected Void doInBackground(Void... voids) {
try {
sock = new Socket(LOCAL_IP, PORT);
prWriter = new PrintWriter(sock.getOutputStream());
prWriter.write(message);
prWriter.flush();
prWriter.close();
sock.close();
} catch (IOException e) {
e.printStackTrace();
tvFromSer.setText(e.toString());
}
return null;
}
}
}
java.net.connectException: failed to connect to /127.0.0.1 (port 2002) from /:: (port 58590): connect failed: ECONNREFUSED (Connection refused)
我想你忘了在 AndroidManifest.xml 中授予权限
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